Jon Schull on visualizing blogthreads

It's a nifty idea. My reflex comment is that if the
authoring UI were to capture just a sprinkling of metadata -- for
example, cues that a post intends to "opine" or "clarify" or
"disagree" or "summarize" -- then these kinds of visualizations
would become much more feasible. But the use of such cues, like the
use of titles, would take a little time to do, and a little thought
to do well.